DESALINATION SYSTEM FOR THE PRODUCTION OF POTABLE WATER
20170233264 · 2017-08-17
Inventors
Cpc classification
Y02A20/212
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
B01D1/14
PERFORMING OPERATIONS; TRANSPORTING
Y02A20/00
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
C02F1/18
CHEMISTRY; METALLURGY
Y02W10/37
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02A20/142
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
B01D5/006
PERFORMING OPERATIONS; TRANSPORTING
Y02A20/124
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
B01D1/0058
PERFORMING OPERATIONS; TRANSPORTING
C02F1/10
CHEMISTRY; METALLURGY
B01D5/0087
PERFORMING OPERATIONS; TRANSPORTING
Y02A20/211
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
B01D5/0027
PERFORMING OPERATIONS; TRANSPORTING
International classification
C02F1/18
CHEMISTRY; METALLURGY
B01D5/00
PERFORMING OPERATIONS; TRANSPORTING
Abstract
An evaporation and condensing system having a structure including an evaporator section and a condenser section. A first nozzle system is disposed in the evaporator section. The first nozzle system is in communication with a first feed pipe disposed at least partially in the structure, the first feed pipe is adapted to be in communication with a first substance. A second nozzle system is disposed in the condenser section. The second nozzle system is in communication with a second feed pipe disposed at least partially in the structure. The second feed pipe is adapted to be in communication with a second substance. A first porous knockout panel is disposed proximate the evaporator section. A second porous knockout panel is disposed proximate the condenser section. A first substance drain is disposed in the evaporator section. A second substance drain is disposed in the condenser section.
Claims
1. An evaporation and condensing system comprising: a structure having an evaporator section and a condenser section; a first nozzle system is disposed in the evaporator section; the first nozzle system is in communication with a first feed pipe disposed at least partially in the structure, the first feed pipe is adapted to be in communication with a first substance; a second nozzle system is disposed in the condenser section; the second nozzle system is in communication with a second feed pipe disposed at least partially in the structure, the second feed pipe is adapted to be in communication with a second substance; a first porous knockout panel is disposed proximate the evaporator section; a second porous knockout panel is disposed proximate the condenser section; a first substance drain is disposed in the evaporator section; and a second substance drain is disposed in the condenser section.
2. The evaporation and condensing system of claim 1, wherein the first feed pipe is in communication with an evaporator feed tank; the evaporator feed tank includes a first heat exchanger for heating the first substance.
3. The evaporation and condensing system of claim 2, wherein the evaporator feed tank is adapted to be in communication with the first substance drain.
4. The evaporation and condensing system of claim 2, wherein the first heat exchanger is adapted to receive heat from at least one of: a conventional gas heater, a solar panel heater, recovered waste heat from an industrial process, a combustion engine exhaust recovery system, a low temperature geothermal waste water, and a heater powered by wind or solar.
5. The evaporation and condensing system of claim 1, wherein the second feed pipe is in communication with a chilled substance tank, the chilled substance tank includes a second heat exchanger for cooling the second substance.
6. The evaporation and condensing system of claim 5, wherein the chilled substance tank is adapted to be in communication with the second substance drain.
7. The evaporation and condensing system of claim 5, wherein the second heat exchanger is adapted to receive cooling from at least one of: a conventional evaporative chiller system, a pond, a stream, a lake, a river, and an ocean.
8. An evaporation and condensing system comprising: a structure having an evaporator section and a condenser section; a first nozzle system is disposed in the evaporator section; the first nozzle system is in communication with a first feed pipe disposed at least partially in the structure, the first feed pipe is adapted to be in communication with a first substance; a second nozzle system is disposed in the condenser section; the second nozzle system is in communication with a second feed pipe disposed at least partially in the structure, the second feed pipe is adapted to be in communication with a second substance; a first porous knockout panel is disposed proximate the evaporator section; a second porous knockout panel is disposed proximate the condenser section; a first substance drain is disposed in the evaporator section; a second substance drain is disposed in the condenser section; wherein the first feed pipe is in communication with an evaporator feed tank; the evaporator feed tank includes a first heat exchanger for heating the first substance; wherein the evaporator feed tank is adapted to be in communication with the first substance drain; wherein the first heat exchanger is adapted to receive heat from at least one of: a conventional gas heater, a solar panel heater, recovered waste heat from an industrial process, a combustion engine exhaust recovery system, a low temperature geothermal waste water, and a heater powered by wind or solar; wherein the second feed pipe is in communication with a chilled substance tank, the chilled substance tank includes a second heat exchanger for cooling the second substance; wherein the chilled substance tank is adapted to be in communication with the second substance drain; and wherein the second heat exchanger is adapted to receive cooling from at least one of: a conventional evaporative chiller system, a pond, a stream, a lake, a river, and an ocean.
9. A method of evaporation and condensing using a structure having an evaporator section and a condenser section comprising the steps of: placing first nozzle system in the evaporator section; the first nozzle system is in communication with a first feed pipe disposed at least partially in the structure, the first feed pipe is adapted to be in communication with a first substance; placing a second nozzle system in the condenser section; the second nozzle system is in communication with a second feed pipe disposed at least partially in the structure, the second feed pipe is adapted to be in communication with a second substance; adding a first porous knockout panel proximate the evaporator section; adding a second porous knockout panel proximate the condenser section; placing a first substance drain in the evaporator section; and placing a second substance drain in the condenser section.
10. The evaporation and condensing method of claim 9, wherein the first feed pipe is placed in communication with an evaporator feed tank; the evaporator feed tank includes a first heat exchanger for heating the first substance.
11. The evaporation and condensing method of claim 10, wherein the evaporator feed tank is adapted to be in communication with the first substance drain.
12. The evaporation and condensing method of claim 10, wherein the first heat exchanger is adapted to receive heat from at least one of: a conventional gas heater, a solar panel heater, recovered waste heat from an industrial process, a combustion engine exhaust recovery system, a low temperature geothermal waste water, and a heater powered by wind or solar.
13. The evaporation and condensing method of claim 9, wherein the second feed pipe is placed in communication with a chilled substance tank, the chilled substance tank includes a second heat exchanger for cooling the second substance.
14. The evaporation and condensing method of claim 13, wherein the chilled substance tank is adapted to be in communication with the second substance drain.
15. The evaporation and condensing method of claim 13, wherein the second heat exchanger is adapted to receive cooling from at least one of: a conventional evaporative chiller system, a pond, a stream, a lake, a river, and an ocean.
16. The evaporation and condensing method of claim 9, wherein the first nozzle system in the evaporator section and the second nozzle system in the condenser section circulate a carrier gas in one of a a clockwise or counterclockwise direction throughout the structure.
17. The evaporation and condensing method of claim 16, wherein the second nozzle system comes into contact with the carrier gas moving from the evaporator section into the condenser section.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0018]
[0019]
[0020]
[0021]
DETAILED DESCRIPTION
[0022] The embodiments described herein are not intended to be exhaustive or otherwise limit or restrict the claims to the precise form and configuration disclosed in the following detailed description. The system variation selected for this description is a low temperature, inflatable, desalination system. It should be noted that the following description and accompanying drawings do not restrict the claimed invention.
[0023] The system described and illustrated in
[0024] The term “desalination” and any variation as used throughout the specification is defined hereinafter to include: the removal of salts, minerals, or any impurities from a target substance by at least one method of evaporation and condensation.
[0025] The term “low temperature” and any variation thereof as used throughout the specification is defined hereinafter to include: temperatures in the 120° Fahrenheit (F) to 160° F. range at sea level and as further described below.
[0026] The term “communication” and any variation thereof as used throughout the specification is defined hereinafter to include: an act or instance of transmitting a substance, gas, element, or molecule; a system or structure for transmitting a substance, gas, element, or molecule; a system or structure for moving a substance, gas, element, or molecule; and a technology for the transmission of a substance, gas, element, or molecule.
[0027] The term “substance” and any variation thereof as used throughout the specification is defined hereinafter to include: a fluid, a gas, a gaseous mixture, and any combination thereof.
[0028] The term “inflatable” and any variation thereof as used throughout the specification is defined hereinafter to include: a plastic or rubber structure capable of receiving air or any gas.
[0029] The term “plastic” and any variation thereof as used throughout the specification is defined hereinafter to include: at least one of any of numerous organic, synthetic, or processed materials having a property including any one of elastic, thermoplastic or thermosetting.
[0030] The desalination system illustrated in
[0031] The saturated carrier air may include some entrained salt water droplets. A porous knockout panel (11) secured at one end of the evaporator section (2) will remove these entrained salt water droplets. The saturated hot carrier gas then moves into the condenser section (3). The un-evaporated salt water in the evaporator section (2) collects in the evaporator pan (2a) and returns via pipe (14) by gravity feed into the salt water tank reservoir (15). In the condenser section (3) the hot carrier air is cooled when it makes direct contact with sprayed distilled water coolant. The distilled water feed for this cold water spray is pumped by a pump (23) from the distilled water reservoir (24) through a corrugated stainless steel tube heat exchanger (22) that is immersed in cold water. The resulting cool distilled water flows from the heat exchanger (22) through a pipe (5) to the condenser spray heads (4). The resulting distilled water spray comes in direct contact with the hot moist carrier air; cooling the air and condensing moisture form it. The resulting condensate and the spent distilled water coolant collect in the condenser pan (3a) and flow by gravity through a pipe (13) into the distilled water reservoir (24). This distilled water is then either recycled or removed as product through a valve (25). In some cases the distilled water spray produces atomized droplets that are carried by the carrier air. A knock out panel (11a) can be mounted at the end of the evaporator section (2) to enhance condensate recovery if this is a problem. The now cool dry carrier air is recycled through the evaporator section (2).
[0032] An access port (12) is installed in the inflatable structure (1) in order to service the inflatable structure (1). A hot water generator (21) provides heat to the hot water tank (19). A pump (20) circulates water from the hot water tank (19), through the hot water generator (21) and back to the hot water tank (19).
[0033] In the described exemplary system, heating and cooling of the carrier air during recycle provides the momentum for vapor formation and vapor condensation. Heated salt water sprayed into the evaporator section (2) contacts the carrier air flow, heating it and thus increasing the amount of moisture that it can carry. Some of the heated salt water evaporates producing a saturated hot carrier air. The spray heads (6) are aligned so that the sprayed hot salt water pushes the heated, saturated carrier air in a clockwise direction into the condenser section (3). Chilled distilled water is sprayed into this section. The condenser spray heads (4) are aligned to provide maximum coverage and maximum push to the clockwise movement of the carrier air. The saturated hot moist carrier air contacts the chilled distilled water spray cooling it on contact. This cooling causes condensation of moisture from the carrier air. Condensed product and spent distilled water coolant collect in the condenser pan (3a) and return by gravity into the DW reservoir (24) for recycle. Carrier air at different temperatures has different moisture carrying capabilities. The higher the temperature, the higher the saturation point and the more moisture the carrier air can carry. However, saturation can occur at any temperature. The amount of condensate produced also depends on the temperature differential between the carrier leaving the evaporator section (2) and the carrier air leaving the condenser section (3). The higher the average temperature of like differentials, the higher the distillation rate. This embodiment takes advantage of these characteristics and can theoretically distill water at any temperature as long as the heat input and the differential temperature ranges are adequate.
[0034] The construction materials used in the system determine the possible operation temperatures that can be used. In the 120° F. to 160° F. ranges, the structure as well as plumbing can be made of plastic materials (i.e. pvc, cpvc or epdm or other plastics). The salt water side heat exchanger (17) in this embodiment is a titanium plate heat exchanger. However, in certain applications the heat exchanger could be made of temperature tolerant plastic or rubber. The heat for this heat exchanger can come from a solar thermal field at the hot water generator (21), or can be waste heat derived from a geothermal operation, an industrial facility, a power plant or from combustion engine heat and exhaust. Heat in the (120° F. to 160° F.) range can be generated environmentally or can be recovered waste heat that is normally discarded. The cold water side heat exchanger (22) is either a stainless steel plate type heat exchanger or a stainless steel corrugated tube heat exchanger. The cold water used in the heat exchanger (22) can be derived from a stream, pond, ocean or evaporator chiller. The temperature of the cold source will work best if it is below 75° F. The system as is described herein is operated at normal atmospheric pressures.
[0035] Hereinafter, the exemplary desalination water system described in the present embodiment will be explained with the use of illustrations in
[0036] A configuration of the desalination system is shown in
[0037] One alternative embodiment of the distillation system (not illustrated) utilizes an inflatable structure for the evaporator section (2) and condenser section (3) of the system. Details for anchoring this system to the footing are illustrated in
[0038] The product generated by the present embodiment may need further treatment if it is to be used as potable water. In most cases, this will involve the use of activated charcoal treatment to remove any dissolved plastic leach materials. The product may also be treated with ozone prior to use. If the source of water used for desalination contains contaminants, further treatment of the product may be necessary. In this case, chlorine generated on sight by electrolysis of salt water will be used as a disinfectant prior to filtration through the charcoal filter. The filter will reduce toxic chlorine to non-toxic chloride ion. If for any reason the whole system needs to be disinfected, chlorine treatment followed by water wash and carbon treatment of the wash water can be done.
[0039] The desalination system will be sized according to the amount of heat that is available. The capacity of the desalination system could be as low as 2 gal to as much as 2,000 gal of potable water per hour. The structure (1) housing the evaporator section (2) and condenser section (3) can be made to order. The size of the structure (1) required, depends on the carrier air cycle rate and the residence time needed to heat and saturate the circulating carrier air in the evaporator section (2) and the time needed to cool the saturated hot carrier air and condense the moisture from that air stream in the condenser section (3). The normal temperatures for operation of the distillation system will be below 160° F. Because of the low operation temperatures, inflatable plastic structures and plastic plumbing construction materials and tanks can be used. The connecting piping (pvc and cpvc) and pumps for the heated salt water cycle can be sized by estimating the quantity of heat needed to heat the carrier air and evaporate adequate water to provide for a given distillation rate. Once this is known and the temperature differential of the evaporator salt water inlet and outlet feed is estimated, then the expected flow rates can be calculated. In the same way the distilled water coolant flow rates can be estimated. In low temperature applications, the salt water reservoir (15) and the distilled water reservoir (24) are polypropylene tanks sized to provide at least six hours of operation time. Salt water can be taken directly from the source or if pretreatment is necessary, the treated water can be stored in lined earthen ponds prior to use. Distilled water product is stored in polyethylene tanks. In large systems, lined earthen ponds can be used. The interior of the inflatable structure (1) can be accessed through a sealable access port (12) at the end of the structure (1). The spray heads (6) used in the evaporator section (2) are the non-clogging type and can handle most solids that may precipitate from brine concentrates.
[0040] A preferred embodiment of the description is provided above. However, it is to be understood that various changes can be made with respect to the present embodiment and all such changes as within the true spirit and scope of the provided description are intended to be included in the accompanying claims. For instance, the described desalination system can be built on a salt water estuary or pond. The salt water and distilled water tanks can be insulated bladder tanks suspended below a floating inflated structure that contains a sealed evaporator and condenser section. In this application, the pumps would be submersible pumps mounted in each of the bladder tanks.
INDUSTRIAL APPLICABILITY
[0041] The desalination system, according to the present description, has the effect of being able to distill water or other volatile solutions at temperatures significantly below the boiling points of those solutions. This means that the heat needed to run the system can be recovered from industrial waste heat streams, from environmental heat sources or other low grade heat sources. Because of the low temperatures involved, inexpensive, non-corroding plastics can be used in the construction of these systems in most applications. Besides providing potable water from salt water or other non-potable water sources, the technology can be used to provide recyclable water for farm or industrial use and or reduce the volume of industrial waste streams such as but not limited to fracking waste, grey water or paper production waste. The use of non-clogging spray nozzles in the evaporator section (2) and easy access to the inflatable structures interior (1), facilitate a wide application for the described system. Modification of the system above can be used for the purification of distillable chemicals such as alcohols, hydrocarbons and other volatile industrial products.
Process Description
[0042] A carrier gas (system air) under the right conditions will become saturated with liquid (water) vapor. The higher the temperature of the carrier gas, the more liquid vapor it can carry. The faster the carrier gas moves, provided that the system can still saturate and heat the gas, the more the potential distillate that can be derived from it. In the system described in the embodiment of
[0043] The process described by the embodiment of
[0044] Perhaps the most attractive application for the above described system is the large scale production of potable water from sea water and brackish water sources. The process is economical, safe and utilizes waste heat or environmentally derived heat sources. Second is the clean-up and recovery of useable products from industrial waste waters such as those found on fracking sites, paper process sites, farm sites and sewage plants.
[0045] In other applications where distillation system is a closed system; carrier gases other than air can be used. Low temperature distillation in a non-oxygen environment at atmospheric pressure in the described embodiment above can be applied to any process that involves the purification of products that have a reasonable vapor pressure at the operational temperatures. In some cases, the inflatable structure and liner materials will have to be changed in order to make the system compatible with the application. Distillation of products using this system allows purification to be achieved at temperatures well below the products boiling point. The lack of oxygen and the low temperature used makes the system especially attractive for the purification of oxygen and temperature sensitive materials and combustible products. Again, the heat needed for these operations can be low quality recovered heat that is normally wasted. Potential applications include but are not limited to the purification of volatile bio-fuels such as methanol, ethanol, other alcohols and certain hydrocarbon products and some industrial chemicals such as alcohols, ketones, aldehydes and certain functional hydrocarbons.
[0046] The evaporation and condensing system of
[0047] A method of evaporation and condensing using a structure having an evaporator section and a condenser section of
[0048] The preceding description has been presented only to illustrate and describe exemplary embodiments of the methods and systems of the claims. It is not intended to be exhaustive or to limit the claims to any precise form disclosed. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the description. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the description without departing from the essential scope. Therefore, it is intended that the description not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this description, but that the description will include all embodiments falling within the scope of the claims. The description may be practiced otherwise than is specifically explained and illustrated without departing from its spirit or scope. The scope of the description is limited solely by the following claims.